[Bug libstdc++/60645] locale::facet::_S_get_c_locale does not handle __gthread_once error codes.

[chris at contemporary dot net.au]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60645

--- Comment #3 from Chris Johns <chris at contemporary dot net.au> ---
Yes I agree the error should not happen in this case. I apologise as I should
have looked for a better example to highlight the issue being discussed in the
RTEMS project.

I also agree the handling of any error is a problem. In
libsupc++/atexit_thread.cc:91 the once is ok, the key create however can return
EAGAIN in the RTEMS case. Being an embedded system we allow resources to be set
and limited by users so any error being silently ignored like this is a
concern.